Using the Lincoln OMNIShield Clear Face Shield is easy. First, adjust the multi - axis headgear to fit your head comfortably. You can use the hard hat adapters if you're wearing a hard hat. Put on the shield, and enjoy the full field of view and protection. When it comes to maintenance, clean the anti - fog and anti - scratch lenses gently with a soft cloth. Avoid using harsh chemicals as they may damage the coatings. Check the replaceable lenses and sweatbands regularly. If they're worn out, replace them to keep the shield in good condition. Remember to store the shield in a cool, dry place when not in use. Also, make sure the headgear is tightened properly for safety, but not too tight to cause discomfort.